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15
Math.TechQA.Club
2026-03-29 10:47:57
441
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What is a copresheaf on a "precategory"?
Published on
29 Mar 2026 - 10:47
#category-theory
#simplicial-stuff
#higher-category-theory
61
Views
Basics of Lie 2-algebras?
Published on
27 Oct 2012 - 17:57
#category-theory
#lie-groups
#lie-algebras
#higher-category-theory
679
Views
Deligne tensor product
Published on
05 Nov 2012 - 2:05
#reference-request
#algebraic-geometry
#algebraic-topology
#category-theory
#higher-category-theory
397
Views
Reasons for coherence for bi/monoidal categories
Published on
30 Nov 2012 - 19:03
#category-theory
#monoidal-categories
#higher-category-theory
211
Views
Lax algebras as lax morphisms
Published on
26 Mar 2026 - 6:20
#reference-request
#higher-category-theory
#monads
396
Views
Are bicategories and lax 2-categories the same?
Published on
22 Feb 2013 - 18:17
#category-theory
#definition
#abelian-categories
#higher-category-theory
623
Views
What is a monad in a $2$-category?
Published on
26 Mar 2026 - 4:51
#reference-request
#category-theory
#higher-category-theory
#monads
85
Views
Tensor structure on category of symmetric monoidal categories, $\mathsf{SymMonCat}$.
Published on
03 Aug 2020 - 12:38
#abstract-algebra
#category-theory
#higher-category-theory
325
Views
Natural transformations as functors from product category
Published on
04 Aug 2020 - 15:39
#reference-request
#category-theory
#higher-category-theory
66
Views
Reference or counterexample: simplicial algebra isomorphism
Published on
29 Mar 2026 - 14:27
#abstract-algebra
#homotopy-theory
#simplicial-stuff
#higher-category-theory
#model-categories
4.6k
Views
What is an infinity category, really?
Published on
18 Aug 2020 - 12:05
#algebraic-topology
#homotopy-theory
#higher-category-theory
#model-categories
101
Views
Proof of $\mathfrak{S}_F \times_{\mathfrak{S}_H} \mathfrak{S}_G \cong \mathfrak{S}_{F \times_H G}$, categories fibered in sets
Published on
25 Mar 2026 - 10:59
#algebraic-geometry
#category-theory
#higher-category-theory
#algebraic-stacks
175
Views
An example in algebraic $K$-theory
Published on
25 Mar 2026 - 16:07
#homotopy-theory
#higher-category-theory
#algebraic-k-theory
90
Views
What is a monoidal (-1)-category, more plainly?
Published on
19 Aug 2020 - 13:53
#higher-category-theory
106
Views
Does every representable functor in $\text{Psh}(\mathcal{C}\times{\mathcal{\Delta}})$ have a weak equivalence to $h_{(c,0)}$?
Published on
29 Mar 2026 - 12:41
#algebraic-topology
#category-theory
#homotopy-theory
#simplicial-stuff
#higher-category-theory
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